Open Codex 0.131.3

Open Codex 0.131.3

• Merged upstream openai/codex through cfa16fcc2e, bringing in 271 upstream commits after the fork point.
• Preserved fork behavior across the merge: memory overlay/browser, rewind/revoke UX, persistent Shift+Tab speed toggle, /btw, /effort, subagent tracking, git attribution, and Open Codex npm/update identity.
• Reconciled upstream ThreadSettings, Op::UserInput, MCP runtime environment, permission profile, rate-limit, status-surface, and package-layout changes with fork-specific runtime state.
• Restored stale-turn output guards, foreground/background task state, and the Rust workspace release version so binaries report 0.131.3.
• Restored 0.130.x-style user-query history highlighting with visible divider rows and the cyan User › label after the upstream history-cell split.
• Restored the local release-fast build profile used by the direct Linux x64 npm publish path.